Variable-speed transmission



NQV. 4 192.4. 1,513,748

D. S. DE LAVAUD VARIABLE SPEED TRANSMISSION Filed dan. 2l N924 I/nlor' Dim/irl' 'Sensauc/ c/eLal/a ud Patentedv Nov. 4, 1924.

:UNITED ,STATES lMiriam* carica.

nmirnr sEivsAUn nu LavAUn, or rams, FRANCE.

vamente-Semin TRANSMISSION.

T all whom it may concern;

Be it known that I, iMrrm Snivsaun DE LAvAUn, a' citizen of. the United States of driven shaft, particularly 'in' the suppression of transmission .knocks and "vibrations, and in reducing wear due to longitudinal thrusts, and further to ensure proper lubrication of the working parts.

The principal vfeatures fof the invention consist in the 'novelconstriiction' and'arran ement of anvextension of .the driving shaig-t connected with the oscillatable mein`- ber in co-operation with a flexible resisting couple adapted to absorb the shocks of trans mission, and of the arrangement of an opposing elastic couple to oppose the reaction of the princi al resisting couple.

A further eature consists in the construction of the drive shaft andthe rotating oscillatable member to assist in the angular f displacement of said oscillatable member.

A still further feature consists in constructin' the .device to utilize the longitudinal displacement of the drive shaft extension to distribute oil to the working parts.

The accompanying drawing is an illustra! tion in longitudinal section of a mechanism constructed in accord with this invention.

. In the construction herein illustrated, the casing 1 has arranged at one end a cylindrical boss 2 supporting the ball bearings 3 which rotatably support the driving shaft 1 against longitudine movement. l

The portion 5 of thedrive shaft extending inwardly from the bearings 3 is formed with cam surfaces 6 and 7 arranged in angular relation to the ,axis of the shaft and the innermost end 8 extends into a journal 9 fixed in the casing 1.

A slot 10 arranged axially of the shaft 5 extends transversely therethrough and is positioned between the cam surfaces 6 and 7.

A sleeve 11 encircling lthe portion 5 of the appiication .and January 212.1924. serial no. s875395.

shaftis supported by ajdiametrically arranged pin 12 which extends throu h the slot 10 and is slidable longitudinally t ieieof.

Bearing blocks 13 are secured in the ends ofA the sleeve 1,1 and these are formed with. rounded surfaces which bear against the pains 6 and 7 so that when the sleeve is shifted longitudinally the cams will cause' the sleeve to 'be shifted in its axial relation to the shaft.

Ball bearings 14 are arranged upon the sleeve 11 and upon t'hese bearin s is mounted a-ring 15 which carries a 'plura ity 'of radial studs 16 to" which the transmission rods 17 are connected.

4Two f the studs 16 arranged diametrically opposite are rotatably connected to a ring is provided with outwardly rejecting stu s, not shown, which are journa led in the ends of a fork 19'which is formed with a sleeve extension 2O encircling the end 8 of the shaft 4 and is journaled in the bearing .9.

The sleeve 2O extends rearwardly beyond the bearing 9 and is provided with an enlarged cylindrical end 21 which engages the elastic couple formed by a plurality -of Belleville discs 22. These discs are mounted on the 'hollow stem 23 of a piston 24;' arranged in the cylinder 25 secured in the rear end -of the casing 1. The cylinder 25 is charged withoil and a small orice 26 in the head of the piston admits oil to the hollow stem and the sleeve 20 which carries the oil to' the shaft end 8. A central hole 27 in the shaft end 8 conducts oil to the slotA -1O thereby lubricating the slot and pin 12 mission carried by said rods are conveyed to the ring -18 and through the fork 19 supporting the ring and the sleeve 20 to the resisting couple which absorbs same. The resisting cou le is cushioned onthe piston 24 against t e oil in the cylinder 25 and the pressure on the piston forces oil through the tube tolubricate the parts..

In order to obviate vibration through the reaction of the resisting couple 22 a resisting couple 2.9 ofsinaller dimensions'thau the cou le 22 is located in an axial recess 30 inthe s aft 4,- and a rod'31 extends throughiin "earwardly and the blocks 1.3 engaging the cams 6 and 7 efl'ect a change in' the axial disposition Qt the oscillating member. The

variability of the pull on the rods is eqiinlized by the main resisting couple and the result is that vibration throughoutthe whole mechanism is reduced to the minimum.

lVhat I claim as my invention is l. In a variable speed transmission, the' combination with the 'driving and driven shafts and an oscillating memberrotatable with the driving shaft and movable longitudinally and operatively connected ivith the driven shaft, of a slidablc member pivotally connected to the oscillatable niember, a iexibleresisting member engaging said slidable membe'ig'canis on the driving shaft engaging the oscillntable member, and" a fienible resisting member operatively engaging the oscillating member to oppose the reaction of the aforesaid resisting member.

2. In a variable speed transmission, the

combination with the drivingr and driven shafts and an oscillating member rotatablel with the driving shaft and movable longitudinally and operatively connected with thc` driven shaft, of a. slidablemcmber pivotally connected tothe oscillatablemember, a flexible resisting member engaging said slidable member, a 'yielding member snpporting said resisting member, a tluid chamber adjacent to said yielding member, and means for conducting fluid lubricant from said chamber to the axis of said oscillatable member.

3. In a variable speed transmission, the combination with the driving and driven shafts and an oscillating member rotatable wththe driving shaft and movable longitudinally and operativelyv connected with the driven shaft, of a slidablc member pivot-ally connected to the oscillatable member, a flexible resisting member engaging said slidable member, a cylinder, a piston in said cylinder supporting said resisting member and having an orifice in its head, and a conduit through said slidable member leadingto the axis ofthe oscillatable member.

4. In a' variable speed transmission, the combination with the driving and driven shafts and an oscillating member rotatable with the driving 'shaft and movable longitudinally and operatively connected with the driven shaft, of a slidable member )ivotally connected to .the oscillatableineinlier` a flexible resisting member engaging said slidable member, cams on the driving shaft engaging the oscillatable member, a flexible resisting member f housed in the driving shaft, and a. rod slidably arranged in said shaft" between the latter resisting member and the pivotal support of the oscillatable member. -1

5. In a variable v[speed transmission, a

driving shaft having an axial slot'ai'idcam `faces, a pinslidable in said slot, a'disc pivotally supported onls'aidY pin' and having blocks engaging said cam faces, 'oke piv.-

a otallyconnected to saidv oscillatable mein-y bei' having a sleeve extension arranged in 'axialA alignment with the shaft, a flexible resisting member engaging said' sleeve, a piston -supporting said resisting member, a

cylinder supporting said piston, Huid lubrif' cant in said piston, an orifice in said piston to conduct lubricant to said sleeve, a ductin the driving shaft conducting lubricant to said slot, a driven shaft, and vmeans for connecting said oscillatable member with said driven shaft'.

DlMITRl SENSAUD de LAVAUD. 

